SECTION 10-H 1952 BUICK SIGNAL SYSTEMS 10-58 1952 BUICK STOP LIGHTS AND SWITCH The 1952 Buick stop lights are incorporated in the combination tail, stop, and direction signal lamps. These lamps and the replacement of bulbs are covered in paragraph 10-56. The 1952 Buick stop lights are controlled by a hydraulic switch mounted on the brake pipe [...]